Calculate the mass of Ca2+ in CaCO3/Na2CO sample mass of 2.02 grams? (PLEASE HELP)
Calculate the mass of Ca2+ in CaCO3/Na2CO sample mass of 2.02 grams? (PLEASE HELP)
Calculate the grams of CaCO3 assuming a 1:1 molar ratio between EDTA and CaCO3. Use the average moles of Ca2+ from all 3 trails (tap water) to calculate the grams. This is the equation he wants us to use: (moles of Ca2+) (1mol CaCO3/1mol Ca2+) (100.1g/1molCaCO3) Average was: 0.074203 moles Ca2+ from all 3 trials Then the answer from that we have to figure out parts per million of the tap water. He gave us this equation: ppm=milligrams CaCO3/Kg H2O
The total hardness a water sample is 200 mg/l as CaCO3. The calcium (Ca2+) concentration is 50 mg/l. Calculate the magnesium (Mg2+) concentration, in mg/l.
The total hardness a water sample is 200 mg/l as CaCO3. The calcium (Ca2+) concentration is 150 mg/l. Calculate the magnesium (Mg2+) concentration, in mg/l.
Calculate the mass of unknown sample required to prepare a 250 mL sample that is ~1x10^-3 M in Ca2+, by assuming that the weight percent of CaCO3 to be 50%.
please help.
8 Use the information and examples provided in the Exploration to calculate how many moles of CaCh+2H20 are present in 150 g of CaCly 2H20 and then calculate how many moles of pure Cach are present in the 1.50 g of CaCl 2H2O. Record the answers in Data Table 1 Use the information and examples provided in the Exploration (and values input into Data Table 1, in step 8) to determine how many moles of Nazco, are necessary...
A water sample contains 0.004 M Ca2+ and 0.003 M Mg2+. Calculate the water hardness of this sample (ppm CaCO3).
please help due tonight
12. What mass of Na2CO, (molar mass = 106.0 g/mol) is required to react completely with 21.6 ml. of 0.120 M HCI? (show all conversions using appropriate factors with units) (6 points) Na.CO3(aq) + 2HCl(aq) + 2NaCl(aq) + H2O(l) + CO(g)
help with parts A-D please
Exercise 6.38 Calculate the mass in grams of each elemental sample: Part A 133x1020 uranium atoms IVO AED O ? m = Submit Request Answer Part B 2.60x1022 zinc atoms VO A Om ? Submit Request Answer Part 5.00x1023 lead atoms ΑΣΦ 6 - Ο ΕΞ ? Submit Request Answer Part D 6.53x1024 silicon atoms Η ΑΣΦ 5 ή ? Τη = Submit Request Answer
the reaction is: CaCl2(aq) +
Na2CO3(aq) ? CaCO3(s) +
2NaCl(aq)
Mass Grams Mass of CaCl Mass of Na2CO Mass of Filter Paper Mass of Product, CaCO3 (Experimental Yield) Experimental Observations 2 gm 2.5 gm 2.3 gm 2.4 gm 1. What is the proper name of CaCO? When is it used in real life? 2. What happened to the excess reactant after the reaction was complete? 3. What was the limiting reagent in your experiment? Show your calculations that prove this....
please help me solve for the blanks
A sample of V weighs 31.5 grams. Will a sample of Na that contains the same number of atoms weigh more or less than 31.5 grams? (more, less): Red Calculate the mass of a sample of Na that contains the same number of atoms. grams of Na Submit Answer Retry Entire Group 8 more group attempts remaining